/Engine/Source/Runtime/Engine/Classes/Engine/StreamableManager.h
Gets list of assets references this load was started with. This will be the paths before redirectors, and not all of these are guaranteed to be loaded
void GetRequestedAssets ( [TArray](API\Runtime\Core\Containers\TArray)< [FSoftObjectPath](API\Runtime\CoreUObject\UObject\FSoftObjectPath) > & AssetList, bool bIncludeChildren ) const